I purchased a brand new Hopper/Sling and a Joey and installed them 5/13. Initially had no Moca problems. I replaced all cable with 3Ghz rated RG6 before install.
After a day or two I setup the Wifi on the Hopper, and immediately started seeing Moca issues described here, and a couple other threads. Having seen reports that bridging solves the problem, I tried enabling the bridge. The red Moca went green right away. Never saw another problem for over a week.
Then 2 days ago right after the 1AM (obnoxious) reboot, I saw the red moca icon on the Hopper a few minutes after the reboot. Note the Joey wasn't even in use. I checked the Joey to see if it was rebooting, it also showed red moca and the video was a little glitchy (but mostly usable). I tried rebooting the Joey, no fix. I then tried rebooting the Hopper via the reset button, also no fix. I did another search here looking for other hints, and the Moca went green on it's own. I was up for another couple hours and noticed the red moca icon disappear and reappear every 10-15 minutes or so in randomly changing intervals. Didn't take any further action for the day.
The next day, observed much the same behavior, the icon would come and go, usually staying red for 10-15 minutes, and going green for 20 minutes. I finally decided to do a hard reboot when it reappeared during a time when I could reboot without breaking anything. This time I removed power from the Hopper, and for good measure removed power from the switch (DPP44, separate dedicated coax run for power line). No red moca since, and it has been about 2 days since that hard reboot.
My thought is that some of this red moca trouble may be due to something within the node, and removing power from the node entirely will clear it up, I also wonder if the bridging setup does something which also results in clearing up the same issue. I tend to not think the node is defective since if it were it should a lot more troublesome then it is. Also there seems to be a number of people seeing very similar trouble.
As for the previous post where they ended up replacing hardware, did any of the previous troubleshooting involve cutting power to everything involved?